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x86: convert mm_context_t semaphore to a mutex

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convert mm_context_t semaphore to a mutex.

Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Luiz Fernando N. Capitulino
2007-10-17 18:04:41 +02:00
committed by Thomas Gleixner
parent 32c464f5d9
commit de8aacbe6a
5 changed files with 14 additions and 13 deletions
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4
arch/x86/mm/fault_32.c
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@ -105,7 +105,7 @@ static inline unsigned long get_segment_eip(struct pt_regs *regs,
LDT and other horrors are only used in user space. */
if (seg & (1<<2)) {
/* Must lock the LDT while reading it. */
down(&current->mm->context.sem);
mutex_lock(&current->mm->context.lock);
desc = current->mm->context.ldt;
desc = (void *)desc + (seg & ~7);
} else {
@ -118,7 +118,7 @@ static inline unsigned long get_segment_eip(struct pt_regs *regs,
base = get_desc_base((unsigned long *)desc);
if (seg & (1<<2)) {
up(&current->mm->context.sem);
mutex_unlock(&current->mm->context.lock);
} else
put_cpu();